This page explains how David K. Chwa (USATT# 19817)'s rating went from 1958 to 1905 at the Ararat Open 2015 held on - 11 Oct 2015. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.